Celebrity news: Stars will gather to honor Frank Sinatra

Lady Gaga and Celine Dion have been added to the list of performers who will be singing in honor of Frank Sinatra next month.

Zac Brown and Harry Connick Jr. will also perform at "Sinatra 100 — An All-Star Grammy ­Concert" on Dec. 2 in Las Vegas, the Recording Academy announced Tuesday.

Sinatra, who died in 1998 at 82, would have turned 100 on Dec. 12.

Previously announced performers include Garth Brooks, Tony Bennett, Carrie Underwood, Alicia Keys, John Legend, Adam Levine and Usher. More performers will be announced at a later date.

The taped event at the Wynn Las Vegas Encore Theatre will air as a two-hour CBS special on Dec. 6. The Recording Academy will announce nominees for the 2016 Grammy Awards on Dec. 7.

New Orleans legend dies

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Toussaint

Legendary New Orleans pianist, songwriter, producer and performer Allen Toussaint, who penned or produced such classics as "Working in a Coal Mine" and "Lady Marmalade," died after suffering a heart attack following a concert he performed in Spain on Monday. He was 77. Rescue workers were called to Toussaint's hotel early Tuesday morning. Toussaint performed Monday night at Madrid's Lara Theater. "He was a legend in the music world," said Quint Davis, who produces the New Orleans Jazz and Heritage Festival. Toussaint performed there so often — frequently as a headliner — that Davis said he referred to it as his "annual concert."

Cosby lawsuit: A New Hampshire woman who accused Bill Cosby last year of drugging and sexually assaulting her in 1965 has sued the entertainer, contending that he wrongly branded her a liar after she came forward. In a federal lawsuit, filed in Massachusetts, Kristina Ruehli said Cosby, through his former lawyer Martin D. Singer, defamed her in a statement he released after Philadelphia Magazine published an article in November 2014 about her accusations.

Fatal fall: A coroner's inquest heard that Australian singer Nick Cave's son had taken LSD before falling to his death from a cliff on England's south coast in July. Coroner Veronica Hamilton-Deeley recorded a verdict of "accidental death" in the case. Evidence established the teenager died of multiple brain injuries. Testimony indicated 15-year-old Arthur Cave had taken the hallucinogenic LSD with a friend shortly before the fall that ended his life. Nick Cave and his wife, Susie,briefly left the inquest as graphic testimony about the injuries was heard.